Bicycle sprocket unit



FIG. 1 is a front elevational view of a bicycle sprocket unit showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view of FIG. 2;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a front elevational view thereof, with several of the sprocket gears removed for clarity of disclosure; and,

FIG. 9 is an enlarged top perspective view thereof.

The broken line showing of environment features shown throughout the drawings are for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a bicycle sprocket unit, as shown and described herein. 